GHSA-wqq3-wfmp-v85g: Mojic: Observable Timing Discrepancy in HMAC Verification

April 16, 2026

The CipherEngine in Mojic v2.1.3 uses a standard equality operator (!==) to verify the HMAC-SHA256 integrity seal during the decryption phase. This creates an Observable Timing Discrepancy (CWE-208), allowing a potential attacker to bypass the file integrity check via a timing attack.

References

github.com/advisories/GHSA-wqq3-wfmp-v85g
github.com/notamitgamer/mojic
github.com/notamitgamer/mojic/security/advisories/GHSA-wqq3-wfmp-v85g

Code Behaviors & Features

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